​

            var fs = new FileSystem({

                timestamp: dynamicMetadata.timestamp,

                files: files

              },

              domDrive,

              dynamicDrive);

​

            callback(null, fs);

​

          });

​

      }

​

      function purgeDynamicAsync(

        domDrive: fs.attached.SyncDrive,

        domMetadata: FileSystem.Metadata,

        dynamicDrive: fs.attached.AsyncDrive,

        dynamicMetadata: FileSystem.Metadata) {

​

        asyncForEach(

          dynamicMetadata.files,

          (f, i, fcallback) => {

            dynamicDrive.writeAsync(f, null, domMetadata.timestamp, () => {

              fcallback(null, null);

            });

          },

          () => {

            var fs = new FileSystem(domMetadata, domDrive, dynamicDrive);

          });

      }

​

    });

  }

}